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I need help. I have replaced the pump, hoses, and o-rings. The only thing that is not new are the steel lines from the pump to the hoses. The do not appear to have any kind of cracks or week spots. I am still leaking fluid somewhere but I can't seem to find the problem. Anyone have any suggestions? If anyone is familiar with Midwest Hose, do you know if they can make those steel lines. Any help would be appreciated.

Hi Tony,
Is this a new pump that you have fitted? One of the possible causes of oil loss is oil passing the pump seal and finding its way into the sump (oil Pan). This should not be a problem with a new pump. Have you noticed any increase in the engine oil? If all is OK there any leak from the steel pipes should be visible. New can be made but are of a very complex shape so if you intend to renew them original ones would be best. If there is nor visible leak past the cylinder rod its not that. Some spool bodies have a circlip with a steel washer and felt pad in the end in place of the big plug shown in the photo. Oil can pass here. It is always possible for the O ring or gasket between the spool body and cylinder to leak so you need to check down the back side of the cylinder.
DavidP

Funny, sent a lot of time today chasing a leak on a mf150 with a leak. It was coming down the block behind the injector pump. After the hood came off the there was a god awful grimy dirty mess under the tank and on top of the valve cover. When i put a wrench om the return line at the entry to tank - no resistance - it was not even finger tight. The other end hooked to the injector return rail was loose as well.

Only had this tractor for 3 weeks - lots of leaks - fixing 'em one by one.

TonyinOK - go back and recheck all connections - the previous owner of my 150 did not and it's been leaking for a long time. Best of luck to you.

You said that you were losing oil somewhere suggesting that the oil was disappearing now you say that you are 'getting a terrible oil bath'. If that's the case it should not be too difficult to see where its coming from.
DavidP

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